In the recent years, the world has witnessed a massive growth in mobile broadband traffic, due to increasing numbers of connected devices, such as smartphones and tablets.
Customers’ expectations for high speed mobile broadband are on the rise as people rely more and more on real-time mobile applications, high quality video content, cloud-based services and expected to stay connected anytime, anywhere. The existing cellular network suffers from inflexible and expensive equipment, complex control plane protocols, and vendor specific configuration interfaces.
This research designed an improved mobile Evolved Packet Core (EPC) architecture, Called Software Defined Evolved Packet Core (SDEPC) which utilize Software Defined Networking (SDN) to introduce an abstraction layer separating the control plane from the underline data plane of 3GPP EPC. This architecture provides centralized control, programmable forwarding entities, and highly flexible and scalable way to deploy new applications and services. As a result, it provides better performance in terms of mobility management and signalling utilization with the advantage of low cost, less complex system implementations, and ease of network management and operation.
The proposed architecture, consists of:
- centralized controller with high-level intelligent, control and configuration programs (MME, SGW, PGW, network discovery) that specify the behavior of an entire network
- forwarding plane represented by several OpenFlow switches, and enhanced eNodeB equip with OpenFlow switch to send and receive OpenFlow messages to/from the controller.
The architecture leverages centralized view feature of the SDN network to handle user traffic during mobility without implementing GTP tunneling used by 3GPP standards.
Figure 1: Software Defined Evolved Packet Core network
Figure 6.4: Load Vs Link Utilization
Figure 6.5: System performance comparison result
Figure 6.6: EPS vs SDEPC Mean Round-Trip Time (RTT)
Mukhald Salih, Nawar Jawad, John Cosmas “Simulation and Performance Analysis of Software-Based Mobile Core Network Architecture (SBMCNA) using OMNeT++” IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, June 5th – 8th 2018, Valencia, Spain DOI: 978-1-5386-4729-5/18/$31.00 ©2018 IEEE